In some scenarios, it is desirable that connections on a specific interface be restricted to a lower speed than the maximum supported speed. Such scenarios occur when the device that is connected to the interface is unable to connect at the highest speed possible for that interface.
This speed setting is only supported on the 1G/10G copper ports (ports 1-48) of the SLX 9150-48XT and Extreme 8520-48XT devices to enable the user to force 1000Mbps (1G) speed setting on these interfaces in both full-duplex and half-duplex mode. The master/slave setting allows the interface to act as either a clock master or a slave in the forced speed setting.
The following speed configurations are available:
1000-master-full-duplex
1000-master-half-duplex
1000-slave-full-duplex
1000-slave-half-duplex
To reset the above setting to the default setting of 1G/10G AN mode, use either the speed auto or the no speed command.
If the local port is configured as 1000-master-full-duplex, then the peer port must be configured as 1000-slave-full-duplex.
If the local port is configured as 1000-slave-half-duplex, then the peer port must be configured as 1000-master-half-duplex.
The show interface ethernet command is also enhanced to show the configured speed for the interface.
SLX(conf-if-eth-0/1-2)# do show interface ethernet 0/1 Ethernet 0/1 is up, line protocol is up (connected) Hardware is Ethernet, address is f064.26f2.d80c Current address is f064.26f2.d80c Fixed Copper RJ45 Media Present Interface index (ifindex) is 201334784 (0xc002000) MTU 9216 bytes Maximum Speed : 10G LineSpeed Actual : 1000 Mbit LineSpeed Configured : 1000 Mbit Forced, Duplex: Half Priority Tag disable Forward LACP PDU: Disable Route Only: Disabled